JP2000049678A - Line control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide compatibility regardless of the manufacturers of respective systems by clarifying the handling of an area code in the case of switching a system code to the system code of the other system in the data constitution of line connection signals in the radio system of an MCA system. SOLUTION: In the case that a calling station 1 performs communication with a called station 3 belonging to the other system 4 as the radio station of the other system 4, the calling station 1 switches the system code in the data constitution of the line connection signals 5 from the system code SYSa of the present system to the system code SYSb of the other system for the called station 3 and makes the called station 3 recognize that it is the communication in the other system 4 by an identification code. At the time, the called station 3 does not use the area code for the judgement of a frequency block allocated to SYSb, judges whether or not a frequency band indicated by the channel specifying code of the SYSa is the same group as the SYSb, and when it is the same group, connects the line of the communication by the SYSb.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a line control system in an MCA wireless system.

[0002]

2. Description of the Related Art In a wireless system of the MCA system, as a prior art in which a wireless station controls the allocation of communication lines as a wireless station of a system different from the system to which the wireless station belongs, for example, a "wireless station performing regional disaster prevention wireless communication" Radio Equipment Standard RCR STD-7 ”(established on November 27, 1987,
As shown in Appendix 2-4 of (Radio System Development Center), there is another system communication function for mutual support with neighboring municipalities, and by switching the system code assigned to each system, Some of them operate as radio stations belonging to systems of neighboring municipalities.

Hereinafter, this conventional technique will be described with reference to the data configuration diagram of a line connection signal shown in FIG. In the figure, reference numeral 8 denotes a synchronization signal, which is composed of a bit synchronization signal and a frame synchronization signal, and synchronizes transmission and reception in data transmission of a line connection signal. Reference numeral 9 denotes a system code, which is a code indicating the system to which the wireless station belongs. Reference numeral 10 denotes a signal length code, which indicates a signal length before data error correction (for example, Hagerberger code) processing is performed. Numeral 11 denotes a control code, which indicates the control content of the data to be transmitted, for example, outgoing call, ACK, NAK, call start, call end and the like. 1
Reference numeral 2 denotes a selective calling signal, which indicates the individual number, group number, all stations (simultaneously) of the called station, and the like. Reference numeral 13 denotes a channel designation code, which comprises a frequency band to be used, for example, a code indicating a high group and a low group, and a code indicating a frequency channel to be used. Reference numeral 14 denotes a relay code, which indicates a relay station used in a system including the relay station. An identification code 15 indicates the identification of data to be transmitted, for example, control from a base station, whether or not the communication partner system is the same, whether or not transmission is from a relay station, and the like. Reference numeral 16 denotes a command code, which includes a password for arbitrarily setting general communication, control communication, emergency communication, and the like for each system, and a communication type such as voice, data, and facsimile. Reference numeral 17 denotes a local code, which indicates an individual number of the calling station. Reference numeral 18 denotes an area code, which indicates a frequency block assigned to each system, which is obtained by further dividing a frequency band (high group, low group) to be used into a plurality of frequency blocks. Reference numeral 19 denotes a verification code, which is a code for performing error detection.
Indicates codes and so on.

Next, the operation of the prior art will be described. A system in which the calling station is different from the local station (hereinafter, the local system is called the local system,
In order to perform communication as a wireless station of a different system from the own station as another system, the system code 9 is switched from the own system code (hereinafter, SYSa) to the other system code (hereinafter, SYSb) to be communicated with, so that the line connection is established. Send a signal. At this time, the selective call code 12 specifies a wireless station of the other system, and the identification code 15 is data indicating the other system communication. The communication partner station uses the received line connection signal to identify the other-system communication, and uses SYSb to communicate with the calling station that could not communicate because the system code 9 was originally SYSa. I do.

[0005]

The above-mentioned prior art includes the following:
When the handling of the area code 18 is ambiguous, and the manufacturer of each system is different, the radio station of the other system that has received the request of the other system communicates with the frequency block indicated by the area code 18, It is determined whether the assignment is the same as that assigned by SYSb, and if it is different, there is a drawback that a line connection for other-system communication is not established. The present invention eliminates this drawback and provides a compatible line control scheme regardless of the manufacturer of each system.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is directed to a case where a system code is switched from a data code of a line connection signal in an MCA wireless system to a system code of another system. The handling of the area code 18 is clarified.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A system configuration according to an embodiment of the present invention will be described below with reference to FIG. In the figure, reference numeral 1 denotes a calling station, which is a wireless station that issues a call request for other communication. Reference numeral 2 denotes a local system, which indicates a system to which the calling station 1 belongs, and a system code of a wireless station belonging to the local system 2 is indicated by SYSa. Reference numeral 3 denotes a called station, which is a radio station that receives a call request for other communication. 4 is another system,
The system to which the called station 3 belongs is shown, and the system code of the wireless station belonging to the other system 4 is represented by SYSb. Reference numeral 5 denotes a line connection signal, which is used by the calling station 1 before the called station 3
, Which is transmitted to the called station 3 and requests the connection of a line.

Next, the operation of this embodiment will be described with reference to FIGS. In FIG. 1, when the calling station 1 communicates with the called station 3 belonging to the other system 4 as a wireless station of the other system 4 (hereinafter referred to as other system communication), the calling station 1 On the other hand, the system code 9 of the data configuration of the line connection signal 5 shown in FIG. 3 is switched from the own system code SYSa to the other system code SYSb,
Based on the identification code 15, the called station 3 is made aware that the communication is in the other system 4. At this time, the called station 3 does not use the area code 18 to determine the frequency block assigned to SYSb, and the frequency band indicated by the channel designation code 13 of SYSa is in the same group as SYSb (high group or low group). Is determined), and if they belong to the same group, SYS
b. The communication line connection is performed.

Further, as another embodiment of the present invention, a case of switching operation to a system code of another system having a relay station will be described with reference to FIG. 2 and FIG.
In FIG. 2, when the calling station 1 communicates with the called station 3 belonging to the other system 4 having the relay station 6 as a wireless station of the other system 4 (hereinafter, other system communication), the calling station 1 Switches the system code 9 of the data structure of the line connection signal 5 shown in FIG. 3 from the own system code SYSa to the other system code SYSb with respect to the called station 3 via the relay station 6, The called station 3 recognizes that the communication is relay communication and that the communication is in the other system 4 by the identification code 15. At this time, the called station 3 does not use the area code 18 to determine the frequency block assigned to SYSb, and the frequency band indicated by the channel designation code 13 of SYSa is in the same group (high or low group) as SYSb. Is determined), and if they belong to the same group, the communication line connection by SYSb is performed.

[0010]

According to the present invention, it is possible to perform other-system communication even if the manufacturer is different. For this reason, the range of emergency communication is widened, and it is possible to use the wireless device of the own system even during support activities during a disaster, and it is possible to obtain an excellent effect that detailed information can be collected and communicated. it can.

[Brief description of the drawings]

FIG. 1 is a diagram showing a system configuration according to an embodiment of the present invention.

FIG. 2 is a diagram showing a system configuration according to another embodiment of the present invention.

FIG. 3 is a diagram showing a data configuration of a line connection signal.

[Explanation of symbols]

1: calling station, 2: own system, 3: called station, 4: other system, 5: line connection signal, 6: relay station, 7: relay line connection signal, 8: synchronization signal, 9: system Code, 10: signal length code, 11: control code, 12: selective calling code, 13: channel designation code, 1
4: relay code, 15: identification code,
16: command code, 17: own station code,
18: area code, 19: verification code.

Claims (2)

[Claims] An MCA system comprising a plurality of wireless stations, wherein when communicating between the wireless stations, one of the plurality of communication lines is allocated and controlled using a dedicated control line. In a wireless system, of the data structure of a line connection signal transmitted at the time of a call, a system code indicating a system to which the wireless station belongs is switched from a local station system code to a system code of another system having the same wireless station line control system. A line control system characterized in that a communication line is assigned as a wireless station of a system different from the system to which the system belongs. 2. The line control system according to claim 1, wherein, of the data structure of the line connection signal transmitted at the time of calling, the system code indicating the system to which the terminal belongs is determined by the line control system of the radio station from the own station system code. A line characterized by being configured such that a communication line using a relay station can be allocated as a wireless station of a system different from the system to which the system belongs by switching to a system code of another system having the same and a relay station. control method.